温拌LDHs改性沥青混合料抗紫外老化性能及应用研究  

Anti-ultraviolet aging performance and application of warm-mix asphalt mixtures containing layered double hydroxides additives

作　　者：卢忠明 米轶轩 吴少鹏[3] 蒋永庆 黄文嗣 王志 周宇恒 LU Zhongming;MI Yixuan;WU Shaopeng;JIANG Yongqing;HUANG Wensi;WANG Zhi;ZHOU Yuheng(Sichuan JiuMa Expressway Co.,Ltd,Aba(Ngawa)Tibetan and Qiang Autonomous Prefecture 610000,China;Beijing Xinqiao Technology Development Co.,Ltd,Beijing 100089,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]四川久马高速公路有限责任公司,四川阿坝藏族羌族自治州610000 [2]北京新桥技术发展有限公司,北京100089 [3]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《武汉工程大学学报》2024年第5期585-590,共6页Journal of Wuhan Institute of Technology

基　　金：湖北省国际合作项目(2022EHB006)。

摘　　要：采用层状双金属氢氧化物(LDHs)作为抗紫外添加剂,温拌剂作为降黏添加剂,制备了一种新型抗紫外沥青混合料。通过透射电子显微镜研究了LDHs的晶体稳定性,同时通过黏度试验研究了温拌剂的降黏效果,再通过物理性能试验、车辙试验、水稳定性试验研究了LDHs的最佳掺量及温拌LDHs改性沥青混合料的抗紫外老化性能,最后铺筑温拌LDHs改性沥青混合料试验段,对试验路用性能进行评价。结果表明:在170℃下,LDHs具有良好的晶体稳定性,温拌剂能显著降低LDHs改性沥青的黏度,LDHs能够有效提高温拌沥青混合料的抗紫外性能和力学性能,推荐实体工程中掺加LDHs质量与沥青质量之比为0.03。A new anti-ultraviolet(UV)asphalt mixture using layered double hydroxides(LDHs)as UV-resistant additives and warm-mix agents as viscosity-reducing additives was prepared.The stability of LDHs crystals was investigated by transmission electron microscopy.Simultaneously,viscosity tests were conducted to investigate the viscosity-reducing effect of the warm-mix agents.Subsequently,physical performance test,wheel rutting test,and moisture damage resistance performance test were conducted to investigate the optimal content of LDHs and the anti-UV aging performance of warm-mix asphalt mixtures containing LDHs additives.Finally,a test road with warm-mix asphalt mixtures containing LDHs additives was constructed,and the pavement performances of the test road was investigated.The results indicate that LDHs have excellent crystal structure stability at 170℃.The warm-mix agents significantly reduce the viscosity of the LDHs modified asphalt.LDHs effectively improve the anti-UV aging performance and mechanical performance of the warm-mix asphalt mixtures.The recommended mass ratio of LDHs to asphalt binder for engineering is 0.03.

关 键 词：改性沥青 沥青混合料 层状双金属氢氧化物 温拌剂 老化性能 

分 类 号：U414[交通运输工程—道路与铁道工程]